mod.c

   1 #include "mod.h"
   2
   3 #include <libxml/xmlstring.h>
   4 #include <libxml/HTMLparser.h>
   5
   6 #include <stdint.h>
   7 #include <inttypes.h>
   8 #include <sys/wait.h>
   9 #include <curl/curl.h>
  10
  11 #include <magic.h>
  12
  13 #include "entities.h"
  14 #include "quotes.h"
  15
  16 static const char *nick_self;
  17 static unsigned ponify;
  18 #define elements(x) (sizeof(x)/sizeof(*x))
  19
  20 static struct tdb_context *feed_db, *chan_db, *mail_db, *seen_db;
  21
  22 static struct command_hash command_channel = { "#", NULL };
  23
  24 #define sstrncmp(a, b) (strncmp(a, b, sizeof(b)-1))
  25 #define sstrncasecmp(a, b) (strncasecmp(a, b, sizeof(b)-1))
  26
  27 #define SPAM_CUTOFF 5
  28
  29 static int pipe_command(struct bio *b, const char *target, const char *nick, int redirect_stdout, int redirect_stderr, char *argv[])
  30 {
  31         int fd[2];
  32         int lines = 0;
  33         if (pipe2(fd, O_CLOEXEC) < 0) {
  34                 privmsg(b, target, "Could not create pipe: %m");
  35                 return -1;
  36         }
  37         pid_t pid = fork();
  38         if (pid < 0) {
  39                 privmsg(b, target, "Could not fork: %m");
  40                 close(fd[0]);
  41                 close(fd[1]);
  42                 return -1;
  43         } else if (!pid) {
  44                 int fdnull = open("/dev/null", O_WRONLY|O_CLOEXEC);
  45                 close(fd[0]);
  46                 if (dup3(redirect_stdout ? fd[1] : fdnull, 1, 0) < 0)
  47                         exit(errno);
  48                 if (dup3(redirect_stderr ? fd[1] : fdnull, 2, 0) < 0)
  49                         exit(errno);
  50                 exit(execv(argv[0], argv));
  51         } else {
  52                 int loc = -1;
  53                 char buffer[0x100];
  54                 int bufptr = 0, ret;
  55                 close(fd[1]);
  56                 fcntl(fd[0], F_SETFL, O_NONBLOCK);
  57                 while ((ret = waitpid(pid, &loc, WNOHANG)) >= 0) {
  58                         while (read(fd[0], buffer+bufptr, 1) == 1) {
  59                                 if (buffer[bufptr] != '\n' && bufptr < sizeof(buffer)-1) {
  60                                         bufptr++;
  61                                         continue;
  62                                 } else if (bufptr) {
  63                                         buffer[bufptr] = 0;
  64                                         bufptr = 0;
  65                                         lines++;
  66                                         if (lines < SPAM_CUTOFF)
  67                                                 privmsg(b, nick, "%s", buffer);
  68                                         else
  69                                                 fprintf(stderr, "%s\n", buffer);
  70                                 }
  71                         }
  72
  73                         if (ret) {
  74                                 if (bufptr) {
  75                                         buffer[bufptr] = 0;
  76                                         if (lines < SPAM_CUTOFF)
  77                                                 privmsg(b, nick, "%s", buffer);
  78                                         else
  79                                                 fprintf(stderr, "%s\n", buffer);
  80                                 }
  81                                 if (lines >= SPAM_CUTOFF)
  82                                         privmsg(b, nick, "%i lines suppressed", lines - SPAM_CUTOFF + 1);
  83                                 break;
  84                         }
  85                 }
  86                 if (ret < 0)
  87                         privmsg(b, target, "error on waitpid: %m");
  88                 else
  89                         ret = loc;
  90                 close(fd[0]);
  91                 return ret;
  92         }
  93 }
  94
  95 #include "local.c"
  96
  97 static struct command_hash commands[2048];
  98
  99 static void command_abort(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 100 {
 101         abort();
 102         return;
 103 }
 104
 105 static void command_crash(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 106 {
 107         *(char*)0 = 0;
 108 }
 109
 110 static void command_coinflip(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 111 {
 112         if (getrand() & 1)
 113                 action(b, target, "whirrrs and clicks excitedly at %s", nick);
 114         else
 115                 action(b, target, "eyes %s as nothing happens", nick);
 116 }
 117
 118 static void command_shesaid(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 119 {
 120         privmsg(b, target, "%s: \"%s\"", args ? args : nick, women_quotes[getrand() % elements(women_quotes)]);
 121 }
 122
 123 static void squash(char *title)
 124 {
 125         char *start = title;
 126         goto start;
 127         while (*title) {
 128                 while (*title != '\n' && *title != '\r' && *title != '\t' && *title != ' ' && *title) {
 129                         *(start++) = *(title++);
 130                 }
 131                 if (*title)
 132                         *(start++) = ' ';
 133 start:
 134                 while (*title == '\n' || *title == '\r' || *title == '\t' || *title == ' ')
 135                         title++;
 136         }
 137         *start = 0;
 138 }
 139
 140 struct curl_download_context
 141 {
 142         char *data;
 143         size_t len;
 144 };
 145
 146 static size_t write_data(void *ptr, size_t size, size_t nmemb, void *member) {
 147         struct curl_download_context *ctx = member;
 148         size *= nmemb;
 149         ctx->data = realloc(ctx->data, ctx->len + size);
 150         memcpy(ctx->data + ctx->len, ptr, size);
 151         ctx->len += size;
 152         return size;
 153 }
 154
 155 static const char *get_text(xmlNode *cur)
 156 {
 157         for (; cur; cur = cur->next) {
 158                 if (cur->type == XML_TEXT_NODE)
 159                         return cur->content;
 160         }
 161         return NULL;
 162 }
 163
 164 static const char *get_link(xmlAttr *cur, const char *which)
 165 {
 166         for (; cur; cur = cur->next) {
 167                 if (!strcasecmp(cur->name, which))
 168                         return get_text(cur->children);
 169         }
 170         return NULL;
 171 }
 172
 173 static int get_feed_entry(struct bio *b, const char *nick, const char *target, const char *category, xmlNode *entry, const char **title, const char **link)
 174 {
 175         const char *cur_title = NULL, *cur_link = NULL;
 176         xmlNode *cur;
 177         int cur_match = !category;
 178         for (cur = entry->children; cur; cur = cur->next) {
 179                 const char *name = cur->name, *cur_cat;
 180                 if (cur->type != XML_ELEMENT_NODE)
 181                         continue;
 182                 else if (!strcasecmp(name, "link")) {
 183                         const char *ishtml = get_link(cur->properties, "type");
 184                         const char *rel = get_link(cur->properties, "rel");
 185                         if ((!ishtml || !strcasecmp(ishtml, "text/html")) &&
 186                             rel && !strcasecmp(rel, "alternate"))
 187                                 cur_link = get_link(cur->properties, "href");
 188                 } else if (!strcasecmp(name, "title"))
 189                         cur_title = get_text(cur->children);
 190                 else if (!cur_match && !strcasecmp(name, "category") &&
 191                          (cur_cat = get_link(cur->properties, "term")) &&
 192                          strcasestr(cur_cat, category))
 193                         cur_match = 1;
 194         }
 195
 196         if (cur_title)
 197                 *title = cur_title;
 198         else
 199                 *title = "<no title>";
 200         *link = cur_link;
 201         return !cur_link  ? -1 : cur_match;
 202 }
 203
 204 static const char *walk_feed(struct bio *b, const char *nick, const char *target, const char *url, const char *category, xmlNode *root, const char *last_link)
 205 {
 206         const char *main_title = NULL, *main_subtitle = NULL, *main_link = NULL, *title, *link, *prev_link = NULL, *prev_title = NULL;
 207         char *t;
 208         int match, updates = 0;
 209         xmlNode *cur, *entry = NULL;
 210         for (cur = root->children; cur; cur = cur->next) {
 211                 const char *name = cur->name;
 212                 if (cur->type != XML_ELEMENT_NODE)
 213                         continue;
 214                 else if (!strcasecmp(name, "category"))
 215                         continue;
 216                 else if (!strcasecmp(name, "entry"))
 217                         entry = entry ? entry : cur;
 218                 else if (!strcasecmp(name, "title"))
 219                         main_title = get_text(cur->children);
 220                 else if (!strcasecmp(name, "subtitle"))
 221                         main_subtitle = get_text(cur->children);
 222                 else if (!strcasecmp(name, "link")) {
 223                         const char *ishtml = get_link(cur->properties, "type");
 224                         const char *rel = get_link(cur->properties, "rel");
 225                         if ((!ishtml || !strcasecmp(ishtml, "text/html")) && rel && !strcasecmp(rel, "alternate"))
 226                                 main_link = get_link(cur->properties, "href");
 227                 }
 228         }
 229         if (!main_link || !main_title) {
 230                 privmsg(b, target, "%s: Failed to parse main: %s %s", nick, main_link, main_title);
 231                 return NULL;
 232         }
 233         if (!entry)
 234                 return NULL;
 235
 236         if (!last_link)
 237                 privmsg(b, target, "adding blog %s \"%s\": %s", main_link, main_title, main_subtitle);
 238
 239         match = get_feed_entry(b, nick, target, category, entry, &title, &link);
 240         if (match < 0)
 241                 return NULL;
 242
 243         for (; !match && entry; entry = entry->next) {
 244                 if (!strcasecmp(entry->name, "entry"))
 245                         match = get_feed_entry(b, nick, target, category, entry, &title, &link);
 246         }
 247
 248         if (match < 0)
 249                 return NULL;
 250         if (!last_link) {
 251                 if (match > 0) {
 252                         t = strdup(title);
 253                         squash(t);
 254                         privmsg(b, target, "Most recent entry: %s %s", link, t);
 255                         free(t);
 256                 } else
 257                         privmsg(b, target, "Currently having no entries for this feed that matches the filter");
 258                 return link;
 259         }
 260         if (!strcmp(last_link, link) || !match || !entry)
 261                 return link;
 262
 263         for (entry = entry->next; entry; entry = entry->next) {
 264                 const char *cur_link, *cur_title;
 265                 if (strcasecmp(entry->name, "entry"))
 266                         continue;
 267                 match = get_feed_entry(b, nick, target, category, entry, &cur_title, &cur_link);
 268                 if (match < 0 || !strcmp(last_link, cur_link))
 269                         break;
 270                 if (match) {
 271                         prev_link = cur_link;
 272                         prev_title = cur_title;
 273                         updates++;
 274                 }
 275         }
 276         if (updates == 1) {
 277                 t = strdup(prev_title);
 278                 squash(t);
 279                 privmsg(b, target, "( %s ): %s", prev_link, t);
 280                 free(t);
 281         } else if (updates > 1)
 282                 privmsg(b, target, "( %s ): %u updates, linking most recent", main_link, 1+updates);
 283         t = strdup(title);
 284         squash(t);
 285         privmsg(b, target, "( %s ): %s", link, t);
 286         free(t);
 287         return link;
 288 }
 289
 290 static const char *walk_rss(struct bio *b, const char *nick, const char *target, const char *url, xmlNode *root, const char *last_link)
 291 {
 292         const char *main_title = NULL, *main_link = NULL, *title = NULL, *link = NULL, *ver;
 293         char *t;
 294         xmlNode *cur, *entry = NULL;
 295         ver = get_link(root->properties, "version");
 296         if (!ver || strcmp(ver, "2.0")) {
 297                 if (!ver)
 298                         privmsg(b, target, "%s: Could not parse rss feed", nick);
 299                 else
 300                         privmsg(b, target, "%s: Invalid rss version \"%s\"", nick, ver);
 301                 return NULL;
 302         }
 303         for (cur = root->children; cur && cur->type != XML_ELEMENT_NODE; cur = cur->next);
 304         if (!cur)
 305                 return NULL;
 306         for (cur = cur->children; cur; cur = cur->next) {
 307                 const char *name = cur->name;
 308                 if (cur->type != XML_ELEMENT_NODE)
 309                         continue;
 310                 if (!strcasecmp(name, "title"))
 311                         main_title = get_text(cur->children);
 312                 else if (!strcasecmp(name, "link"))
 313                         main_link = main_link ? main_link : get_text(cur->children);
 314                 else if (!strcasecmp(name, "item"))
 315                         entry = entry ? entry : cur;
 316         }
 317         if (!main_link || !main_title) {
 318                 privmsg(b, target, "%s: Failed to parse main: %s %s", nick, main_link, main_title);
 319                 return NULL;
 320         }
 321         if (!entry)
 322                 return NULL;
 323
 324         link = title = NULL;
 325         for (cur = entry->children; cur; cur = cur->next) {
 326                 const char *name = cur->name;
 327                 if (cur->type != XML_ELEMENT_NODE)
 328                         continue;
 329                 if (!strcasecmp(name, "title"))
 330                         title = get_text(cur->children);
 331                 else if (!strcasecmp(name, "link"))
 332                         link = get_text(cur->children);
 333         }
 334         if (!title)
 335                 title = "<no title>";
 336         if (!link) {
 337                 privmsg(b, target, "%s: Failed to parse entry: %s %s", nick, link, title);
 338                 return NULL;
 339         }
 340         if (!last_link) {
 341                 t = strdup(title);
 342                 privmsg(b, target, "adding blog %s \"%s\"", main_link, main_title);
 343                 squash(t);
 344                 privmsg(b, target, "Most recent entry: %s %s", link, t);
 345                 free(t);
 346         } else if (strcmp(last_link, link)) {
 347                 int updates = 0;
 348                 const char *prev_title = NULL, *prev_link = NULL, *cur_title = NULL, *cur_link = NULL;
 349                 for (entry = entry->next; entry; entry = entry->next) {
 350                         if (strcasecmp(entry->name, "item"))
 351                                 continue;
 352                         prev_title = cur_title;
 353                         prev_link = cur_link;
 354                         cur_title = cur_link = NULL;
 355                         for (cur = entry->children; cur; cur = cur->next) {
 356                                 const char *name = cur->name;
 357                                 if (cur->type != XML_ELEMENT_NODE)
 358                                         continue;
 359                                 if (!strcasecmp(name, "title"))
 360                                         cur_title = get_text(cur->children);
 361                                 else if (!strcasecmp(name, "link"))
 362                                         cur_link = get_text(cur->children);
 363                         }
 364                         if (!cur_title)
 365                                 cur_title = "<no title>";
 366                         if (!cur_link || !strcmp(last_link, cur_link))
 367                                 break;
 368                         updates++;
 369                 }
 370                 if (updates == 1) {
 371                         t = strdup(prev_title);
 372                         squash(t);
 373                         privmsg(b, target, "( %s ): %s", prev_link, t);
 374                         free(t);
 375                 } else if (updates > 1)
 376                         privmsg(b, target, "( %s ): %u updates, linking most recent", main_link, 1+updates);
 377                 t = strdup(title);
 378                 squash(t);
 379                 privmsg(b, target, "( %s ): %s", link, t);
 380                 free(t);
 381         }
 382         return link;
 383 }
 384
 385 // HTML is a mess, so I'm just walking the tree depth first until I find the next element..
 386 static xmlNode *next_link(xmlNode *cur_node)
 387 {
 388         if (cur_node->children)
 389                 return cur_node->children;
 390         while (cur_node) {
 391                 if (cur_node->next)
 392                         return cur_node->next;
 393                 cur_node = cur_node->parent;
 394         }
 395         return NULL;
 396 }
 397
 398 static const char *get_atom_link(xmlNode *cur)
 399 {
 400         for (; cur; cur = next_link(cur)) {
 401                 if (cur->type != XML_ELEMENT_NODE)
 402                         continue;
 403                 if (!strcasecmp(cur->name, "link")) {
 404                         const char *isxml = get_link(cur->properties, "type");
 405                         if (isxml && !strcasecmp(isxml, "application/atom+xml"))
 406                                 return get_link(cur->properties, "href");
 407                 }
 408         }
 409         return NULL;
 410 }
 411
 412 static const char *get_rss_link(xmlNode *cur)
 413 {
 414         for (; cur; cur = next_link(cur)) {
 415                 if (cur->type != XML_ELEMENT_NODE)
 416                         continue;
 417                 if (!strcasecmp(cur->name, "link")) {
 418                         const char *isxml = get_link(cur->properties, "type");
 419                         if (isxml && !strcasecmp(isxml, "application/rss+xml"))
 420                                 return get_link(cur->properties, "href");
 421                 }
 422         }
 423         return NULL;
 424 }
 425
 426 static void do_html(struct bio *b, const char *nick, const char *target, const char *url, const char *data, unsigned len)
 427 {
 428         htmlDocPtr ctx = htmlReadMemory(data, len, 0, url, HTML_PARSE_RECOVER|HTML_PARSE_NOERROR|HTML_PARSE_NOWARNING);
 429         xmlNode *root = xmlDocGetRootElement(ctx);
 430         const char *link = get_atom_link(root);
 431         if (link)
 432                 privmsg(b, target, "%s: not a valid feed link, try atom: %s", nick, link);
 433         else if ((link = get_rss_link(root)))
 434                 privmsg(b, target, "%s: not a valid feed link, try rss: %s", nick, link);
 435         else
 436                 privmsg(b, target, "%s: not a valid feed link, no suggestion found", nick);
 437         xmlFreeDoc(ctx);
 438 }
 439
 440 static size_t get_time_from_header(void *data, size_t size, size_t size2, void *ptr)
 441 {
 442         char *d, *e;
 443         size *= size2;
 444         if (sstrncmp(data, "Last-Modified: "))
 445                 return size;
 446         data += sizeof("Last-Modified: ")-1;
 447         *(char**)ptr = d = strdup(data);
 448         if ((e = strchr(d, '\r')))
 449                 *e = 0;
 450         return size;
 451 }
 452
 453 static int check_single_feed(struct bio *b, const char *target, TDB_DATA key, const char *last_modified, const char *url, const char *link, const char *nick)
 454 {
 455         struct curl_download_context curl_ctx = {};
 456         struct curl_slist *headers = NULL;
 457         char error[CURL_ERROR_SIZE], *category = strchr(url, '#');
 458         int retval = -1;
 459         headers = curl_slist_append(headers, "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1");
 460         headers = curl_slist_append(headers, "Accept: */*");
 461         if (category)
 462                 *(category++) = 0;
 463
 464         CURL *h = curl_easy_init();
 465         curl_easy_setopt(h, CURLOPT_HTTPHEADER, headers);
 466         curl_easy_setopt(h, CURLOPT_URL, url);
 467         curl_easy_setopt(h, CURLOPT_WRITEFUNCTION, write_data);
 468         curl_easy_setopt(h, CURLOPT_WRITEDATA, &curl_ctx);
 469         curl_easy_setopt(h, CURLOPT_ERRORBUFFER, error);
 470         curl_easy_setopt(h, CURLOPT_FOLLOWLOCATION, 1);
 471         curl_easy_setopt(h, CURLOPT_MAXREDIRS, 3);
 472         curl_easy_setopt(h, CURLOPT_SSL_VERIFYPEER, 0);
 473         curl_easy_setopt(h, CURLOPT_TIMEOUT, 8);
 474         curl_easy_setopt(h, CURLOPT_CONNECTTIMEOUT, 8);
 475         curl_easy_setopt(h, CURLOPT_FILETIME, 1);
 476         curl_easy_setopt(h, CURLOPT_HEADERFUNCTION, get_time_from_header);
 477         curl_easy_setopt(h, CURLOPT_WRITEHEADER, &last_modified);
 478         //curl_easy_setopt(h, CURLOPT_VERBOSE, 1);
 479
 480         if (last_modified) {
 481                 char *tmp;
 482                 asprintf(&tmp, "If-Modified-Since: %s", last_modified);
 483                 headers = curl_slist_append(headers, tmp);
 484                 free(tmp);
 485         }
 486
 487         int success = curl_easy_perform(h);
 488         curl_slist_free_all(headers);
 489         if (success == CURLE_OK) {
 490                 char *mime = NULL;
 491                 long code;
 492                 curl_easy_getinfo(h, CURLINFO_CONTENT_TYPE, &mime);
 493                 curl_easy_getinfo(h, CURLINFO_RESPONSE_CODE, &code);
 494                 if (code == 304)
 495                         { }
 496                 else if (!mime || !sstrncmp(mime, "application/xml") || !sstrncmp(mime, "text/xml")) {
 497                         const char *ret_link = NULL;
 498                         xmlDocPtr ctx = xmlReadMemory(curl_ctx.data, curl_ctx.len, 0, url, XML_PARSE_NOWARNING | XML_PARSE_NOERROR);
 499                         xmlNode *root = xmlDocGetRootElement(ctx);
 500
 501                         if (!root || !root->name)
 502                                 fprintf(stderr, "Failed to parse feed %s %p", url, root);
 503                         else if (!strcasecmp(root->name, "feed"))
 504                                 ret_link = walk_feed(b, nick, target, url, category, root, link);
 505                         else if (!strcasecmp(root->name, "rss"))
 506                                 ret_link = walk_rss(b, nick, target, url, root, link);
 507                         else {
 508                                 privmsg(b, target, "Unknown feed type \"%s\"", root->name);
 509                                 goto free_ctx;
 510                         }
 511                         if (category)
 512                                 category[-1] = '#';
 513
 514                         if (!ret_link)
 515                                 privmsg(b, target, "Could not feed parse correctly");
 516                         else if (ret_link && (!link || strcmp(ret_link, link))) {
 517                                 TDB_DATA val;
 518                                 asprintf((char**)&val.dptr, "%s\001%s", last_modified ? last_modified : "", ret_link);
 519                                 val.dsize = strlen(val.dptr)+1;
 520                                 if (tdb_store(feed_db, key, val, 0) < 0)
 521                                         privmsg(b, target, "updating returns %s", tdb_errorstr(feed_db));
 522                                 free(val.dptr);
 523                                 retval = 1;
 524                         }
 525                         else
 526                                 retval = 0;
 527
 528 free_ctx:
 529                         xmlFreeDoc(ctx);
 530                 } else if (link)
 531                         {}
 532                 else if (!sstrncmp(mime, "text/html") || !sstrncmp(mime, "application/xhtml+xml"))
 533                         do_html(b, nick, target, url, curl_ctx.data, curl_ctx.len);
 534                 else
 535                         privmsg(b, target, "unhandled content type %s", mime);
 536         } else if (!link)
 537                 privmsg(b, target, "Error %s (%u)", error, success);
 538
 539         free(curl_ctx.data);
 540         curl_easy_cleanup(h);
 541         return retval;
 542 }
 543
 544 static void command_follow(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 545 {
 546         char *space, *last_link = NULL;
 547         TDB_DATA key, val;
 548         int ret;
 549         if (!feed_db)
 550                 return;
 551         if (target[0] != '#') {
 552                 privmsg(b, target, "%s: Can only follow on channels", nick);
 553                 return;
 554         }
 555         if (!args || !*args) {
 556                 privmsg(b, target, "%s: Usage: !follow <url>", nick);
 557                 return;
 558         }
 559
 560         if (((space = strchr(args, ' ')) && space < strchr(args, '#')) ||
 561             (sstrncmp(args, "http://") && sstrncmp(args, "https://"))) {
 562                 privmsg(b, target, "%s: Invalid url", nick);
 563                 return;
 564         }
 565
 566         key.dsize = asprintf((char**)&key.dptr, "%s,%s", target, args)+1;
 567         val = tdb_fetch(feed_db, key);
 568         if (val.dptr)
 569                 last_link = strchr(val.dptr, '\001');
 570         ret = check_single_feed(b, target, key, NULL, args, last_link ? last_link+1 : NULL, nick);
 571         free(val.dptr);
 572         if (!ret)
 573                 privmsg(b, target, "%s: Not updated", nick);
 574         free(key.dptr);
 575 }
 576
 577 static void channel_feed_check(struct bio *b, const char *target, int64_t now)
 578 {
 579         int len = strlen(target);
 580         int64_t save[] = { now, 0, 0 };
 581
 582         TDB_DATA chan, res;
 583         if (!feed_db || !chan_db)
 584                 return;
 585         chan.dptr = (char*)target;
 586         chan.dsize = len+1;
 587         res = tdb_fetch(chan_db, chan);
 588         if (res.dptr && res.dsize >= 8) {
 589                 uint64_t then = *(uint64_t*)res.dptr;
 590                 if (now - then <= 2000)
 591                         return;
 592                 if (res.dsize >= 16)
 593                         save[1] = ((uint64_t*)res.dptr)[1];
 594                 if (res.dsize >= 24)
 595                         save[2] = ((uint64_t*)res.dptr)[2];
 596         }
 597         free(res.dptr);
 598         res.dptr = (unsigned char*)save;
 599         res.dsize = sizeof(save);
 600         if (tdb_store(chan_db, chan, res, 0) < 0) {
 601                 static int complain_db;
 602                 if (!complain_db++)
 603                         privmsg(b, target, "updating database: %s", tdb_errorstr(feed_db));
 604                 return;
 605         }
 606
 607         for (TDB_DATA d = tdb_firstkey(feed_db); d.dptr;) {
 608                 TDB_DATA f = tdb_fetch(feed_db, d);
 609                 TDB_DATA next = tdb_nextkey(feed_db, d);
 610
 611                 if (!strncmp(d.dptr, target, len) && d.dptr[len] == ',') {
 612                         const char *url = (char*)d.dptr + len + 1;
 613                         char *sep;
 614                         if ((sep = strchr(f.dptr, '\001'))) {
 615                                 *(sep++) = 0;
 616                                 check_single_feed(b, target, d, f.dptr, url, sep, target);
 617                         }
 618                 }
 619                 free(d.dptr);
 620                 free(f.dptr);
 621                 d = next;
 622         }
 623 }
 624
 625 static void command_unfollow(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 626 {
 627         TDB_DATA key;
 628         char *url;
 629
 630         if (!feed_db)
 631                 return;
 632
 633         if (!(url = token(&args, ' ')) || (sstrncmp(url, "http://") && sstrncmp(url, "https://"))) {
 634                 privmsg(b, target, "%s: Invalid url", nick);
 635                 return;
 636         }
 637         if (target[0] != '#') {
 638                 privmsg(b, target, "%s: Can only unfollow on channels", nick);
 639                 return;
 640         }
 641         key.dsize = asprintf((char**)&key.dptr, "%s,%s", target, url)+1;
 642         if (tdb_delete(feed_db, key) < 0) {
 643                 if (tdb_error(feed_db) == TDB_ERR_NOEXIST)
 644                         privmsg(b, target, "%s: Not following %s on this channel", nick, url);
 645                 else
 646                         privmsg(b, target, "%s: Could not delete: %s", nick, tdb_errorstr(feed_db));
 647         } else
 648                 privmsg(b, target, "%s: No longer following %s", nick, url);
 649         free(key.dptr);
 650 }
 651
 652 static void command_g(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 653 {
 654         int ret = 0;
 655         int64_t g = 0, g_total = 0;
 656         TDB_DATA chan, res;
 657
 658         if (!chan_db || target[0] != '#')
 659                 return;
 660
 661         chan.dptr = (char*)target;
 662         chan.dsize = strlen(chan.dptr)+1;
 663         res = tdb_fetch(chan_db, chan);
 664         if (res.dptr && res.dsize >= 16) {
 665                 g = ((int64_t*)res.dptr)[1];
 666                 ((int64_t*)res.dptr)[1] = 0;
 667                 if (res.dsize >= 24)
 668                         g_total = ((int64_t*)res.dptr)[2];
 669                 ret = tdb_store(chan_db, chan, res, 0);
 670         }
 671         free(res.dptr);
 672         if (ret < 0)
 673                 fprintf(stderr, "updating database: %s", tdb_errorstr(feed_db));
 674         else
 675                 privmsg(b, target, "%s: %"PRIi64" g's since last check, %"PRIi64" total", nick, g, g_total);
 676 }
 677
 678 static void command_feeds(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 679 {
 680         int len = strlen(target), found = 0;
 681         if (!feed_db)
 682                 return;
 683         if (target[0] != '#') {
 684                 privmsg(b, target, "%s: Only useful in channels..", nick);
 685                 return;
 686         }
 687         for (TDB_DATA d = tdb_firstkey(feed_db); d.dptr;) {
 688                 TDB_DATA f = tdb_fetch(feed_db, d);
 689                 TDB_DATA next = tdb_nextkey(feed_db, d);
 690
 691                 if (!strncmp(d.dptr, target, len) && d.dptr[len] == ',') {
 692                         privmsg(b, target, "%s: following %s", nick, d.dptr + len + 1);
 693                         found++;
 694                 }
 695                 free(d.dptr);
 696                 free(f.dptr);
 697                 d = next;
 698         }
 699         if (!found)
 700                 privmsg(b, target, "%s: not following any feed on %s", nick, target);
 701 }
 702
 703 static void command_feed_get(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 704 {
 705         if (!feed_db)
 706                 return;
 707         for (TDB_DATA d = tdb_firstkey(feed_db); d.dptr;) {
 708                 TDB_DATA next = tdb_nextkey(feed_db, d);
 709                 if (!args || strcasestr(d.dptr, args)) {
 710                         TDB_DATA f = tdb_fetch(feed_db, d);
 711                         privmsg(b, target, "%s: %s = %s", nick, d.dptr, f.dptr);
 712                         free(f.dptr);
 713                 }
 714                 if (strlen(d.dptr)+1 < d.dsize) {
 715                         privmsg(b, target, "%s: removed buggy entry", nick);
 716                         tdb_delete(feed_db, d);
 717                 }
 718                 free(d.dptr);
 719                 d = next;
 720         }
 721 }
 722
 723 static void command_feed_set(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 724 {
 725         if (!feed_db)
 726                 return;
 727         TDB_DATA key, val;
 728         key.dptr = token(&args, ' ');
 729         char *value = token(&args, ' ');
 730         if (!key.dptr || !value)
 731                 return;
 732         key.dsize = strlen(key.dptr) + 1;
 733         val.dsize = strlen(value) + 2;
 734         val.dptr = malloc(val.dsize);
 735         strcpy(val.dptr+1, value);
 736         val.dptr[0] = '\001';
 737         if (tdb_store(feed_db, key, val, 0) < 0)
 738                 privmsg(b, target, "%s: setting failed: %s", nick, tdb_errorstr(feed_db));
 739         else
 740                 privmsg(b, target, "%s: burp", nick);
 741         free(val.dptr);
 742 }
 743
 744 static void command_feed_rem(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 745 {
 746         if (!feed_db || !args)
 747                 return;
 748         TDB_DATA key = { .dptr = (unsigned char*)args, .dsize = strlen(args)+1 };
 749         if (tdb_delete(feed_db, key) < 0)
 750                 privmsg(b, target, "%s: removing failed: %s", nick, tdb_errorstr(feed_db));
 751         else
 752                 privmsg(b, target, "%s: burp", nick);
 753 }
 754
 755 static void command_feed_xxx(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 756 {
 757         if (!feed_db)
 758                 return;
 759
 760         tdb_wipe_all(feed_db);
 761         privmsg(b, target, "%s: all evidence erased", nick);
 762 }
 763
 764 static void command_seen_xxx(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 765 {
 766         if (!seen_db)
 767                 return;
 768
 769         tdb_wipe_all(seen_db);
 770         privmsg(b, target, "%s: all evidence erased", nick);
 771 }
 772
 773 static void command_feed_counter(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 774 {
 775         if (!chan_db)
 776                 return;
 777         tdb_wipe_all(chan_db);
 778         privmsg(b, target, "%s: All update counters reset", nick);
 779 }
 780
 781 static char *get_text_appended(xmlNode *cur)
 782 {
 783         for (; cur; cur = cur->next) {
 784                 if (cur->type != XML_TEXT_NODE)
 785                         continue;
 786                 return strdup(cur->content);
 787         }
 788         return NULL;
 789 }
 790
 791 static char *get_title(struct bio *b, xmlNode *cur_node)
 792 {
 793         for (; cur_node; cur_node = next_link(cur_node)) {
 794                 if (cur_node->type == XML_ELEMENT_NODE && !strcasecmp(cur_node->name, "title")) {
 795                         if (!cur_node->children)
 796                                 return NULL;
 797                         return get_text_appended(cur_node->children);
 798                 }
 799         }
 800         return NULL;
 801 }
 802
 803 static void internal_link(struct bio *b, const char *nick, const char *host, const char *target, char *args, unsigned verbose)
 804 {
 805         CURL *h;
 806         struct curl_slist *headers = NULL;
 807         char error[CURL_ERROR_SIZE];
 808         int success, sent = verbose;
 809         struct curl_download_context curl_ctx = {};
 810
 811         if (!args)
 812                 return;
 813         int64_t stop, start = get_time(b, target);
 814
 815         h = curl_easy_init();
 816         headers = curl_slist_append(headers, "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1");
 817         headers = curl_slist_append(headers, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
 818         headers = curl_slist_append(headers, "Accept-Language: en-us,en;q=0.7");
 819         headers = curl_slist_append(headers, "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7");
 820         headers = curl_slist_append(headers, "DNT: 1");
 821         headers = curl_slist_append(headers, "Connection: keep-alive");
 822         curl_easy_setopt(h, CURLOPT_HTTPHEADER, headers);
 823         curl_easy_setopt(h, CURLOPT_URL, args);
 824         curl_easy_setopt(h, CURLOPT_WRITEFUNCTION, write_data);
 825         curl_easy_setopt(h, CURLOPT_WRITEDATA, &curl_ctx);
 826         curl_easy_setopt(h, CURLOPT_ERRORBUFFER, error);
 827         curl_easy_setopt(h, CURLOPT_FOLLOWLOCATION, 1);
 828         curl_easy_setopt(h, CURLOPT_MAXREDIRS, 3);
 829         curl_easy_setopt(h, CURLOPT_SSL_VERIFYPEER, 0);
 830         curl_easy_setopt(h, CURLOPT_TIMEOUT, 8);
 831         curl_easy_setopt(h, CURLOPT_CONNECTTIMEOUT, 8);
 832         //curl_easy_setopt(h, CURLOPT_VERBOSE, 1);
 833         success = curl_easy_perform(h);
 834         curl_easy_cleanup(h);
 835         curl_slist_free_all(headers);
 836         if (success == CURLE_OK) {
 837                 magic_t m = magic_open(MAGIC_MIME_TYPE);
 838                 magic_load(m, NULL);
 839                 const char *mime = magic_buffer(m, curl_ctx.data, curl_ctx.len);
 840                 if (strstr(mime, "text/html") || strstr(mime, "application/xml") || strstr(mime, "application/xhtml+xml")) {
 841                         htmlDocPtr ctx = htmlReadMemory(curl_ctx.data, curl_ctx.len, 0, args, HTML_PARSE_RECOVER|HTML_PARSE_NOERROR|HTML_PARSE_NOWARNING);
 842                         xmlNode *root_element = xmlDocGetRootElement(ctx);
 843                         char *title = get_title(b, root_element);
 844                         if (title) {
 845                                 char *nuke;
 846                                 squash(title);
 847                                 decode_html_entities_utf8(title, NULL);
 848                                 if ((nuke = strstr(title, " on SoundCloud - Create")))
 849                                         *nuke = 0;
 850                                 if (*title) {
 851                                         privmsg(b, target, "%s linked %s", nick, title);
 852                                         sent = 1;
 853                                 }
 854                                 free(title);
 855                         }
 856                         if (verbose && !title)
 857                                 privmsg(b, target, "%s linked %s page with invalid title", nick, mime);
 858                         xmlFreeDoc(ctx);
 859                 } else if (verbose) {
 860                         magic_setflags(m, MAGIC_COMPRESS);
 861                         const char *desc = magic_buffer(m, curl_ctx.data, curl_ctx.len);
 862                         privmsg(b, target, "%s linked type %s", nick, desc);
 863                 }
 864                 magic_close(m);
 865         }
 866         if (verbose && success != CURLE_OK)
 867                 privmsg(b, target, "Error %s (%u)", error, success);
 868         else if (!sent && (stop = get_time(b, target)) - start >= 15) {
 869                 privmsg(b, target, "Link (%s) by %s timed out, disabling links for 10 seconds", args, nick);
 870                 commands[strhash("get") % elements(commands)].disabled_until = stop + 10;
 871         }
 872         free(curl_ctx.data);
 873 }
 874
 875 static void command_get(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 876 {
 877         if (!args || (sstrncmp(args, "http://") && sstrncmp(args, "https://")))
 878                 return;
 879         internal_link(b, nick, host, target, token(&args, ' '), 1);
 880 }
 881
 882 static void command_fabric(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 883 {
 884         privmsg(b, target, "Dumb fabric!");
 885 }
 886
 887 static void command_admire(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 888 {
 889         char *arg = token(&args, ' ');
 890         privmsg(b, target, "%s: I really like your mane!", arg ? arg : nick);
 891 }
 892
 893 static void command_hugs(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 894 {
 895         action(b, target, "gives a lunar hug to %s", args ? args : nick);
 896 }
 897
 898 static void command_hug(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 899 {
 900         if ((host && !strcmp(host, "life.on.the.moon.is.great.I.know.all.about.it")) ||
 901             (args && !sstrncasecmp(args, "lu")))
 902                 command_hugs(b, nick, host, target, args);
 903         else
 904                 action(b, target, "gives a robotic hug to %s", args ? args : nick);
 905 }
 906
 907 static void command_snuggles(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 908 {
 909         action(b, target, "gives a lunar snuggle to %s", args ? args : nick);
 910 }
 911
 912 static void command_snuggle(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 913 {
 914         if ((host && !strcmp(host, "life.on.the.moon.is.great.I.know.all.about.it")) ||
 915             (args && !sstrncasecmp(args, "lu")))
 916                 command_snuggles(b, nick, host, target, args);
 917         else
 918                 action(b, target, "gives a robotic snuggle to %s", args ? args : nick);
 919 }
 920
 921 static void command_cuddles(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 922 {
 923         action(b, target, "gives cuddles to %s in a lunaresque way", args ? args : nick);
 924 }
 925
 926 static void command_cuddle(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 927 {
 928         if ((host && !strcmp(host, "life.on.the.moon.is.great.I.know.all.about.it")) ||
 929             (args && !sstrncasecmp(args, "lu")))
 930                 command_cuddles(b, nick, host, target, args);
 931         else
 932                 action(b, target, "gives cuddles to %s in a robotic way", args ? args : nick);
 933 }
 934
 935
 936 static void command_cookie(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 937 {
 938         if (args && !strncasecmp(args, nick_self, strlen(nick_self)))
 939                 action(b, target, "eats the cookie offered by %s", nick);
 940         else
 941                 action(b, target, "hands a metallic looking cookie to %s", args ? args : nick);
 942 }
 943
 944 static void command_derpy(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 945 {
 946         static const char *insults[] = {
 947                 "accidentally shocks herself",
 948                 "tumbles down the stairs like a slinky",
 949                 "whirrrs and clicks in a screeching way",
 950                 "had problems executing this command",
 951                 "breaks down entirely",
 952                 "uses her magic to levitate herself off the ground, then hits it face first"
 953         };
 954         action(b, target, "%s", insults[getrand() % elements(insults)]);
 955 }
 956
 957 static void command_inspect(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 958 {
 959         struct command_hash *c;
 960         unsigned leave, crash;
 961         char *cmd;
 962         if (!args || !(cmd = token(&args, ' ')))
 963                 return;
 964
 965         if (strcmp(cmd, "#")) {
 966                 c = &commands[strhash(cmd) % elements(commands)];
 967                 if (!c->string || strcasecmp(c->string, cmd)) {
 968                         privmsg(b, target, "Command %s not valid", cmd);
 969                         return;
 970                 }
 971         } else
 972                 c = &command_channel;
 973
 974         leave = c->left + (c->cmd == command_inspect);
 975         crash = c->enter - leave;
 976         if (c->enter != leave)
 977                 privmsg(b, target, "%s: %u successes and %u crash%s, last crashing command: %s", c->string, leave, crash, crash == 1 ? "" : "es", c->failed_command);
 978         else
 979                 privmsg(b, target, "%s: %u time%s executed succesfully", c->string, leave, leave == 1 ? "" : "s");
 980 }
 981
 982 static void command_rebuild(struct bio *b, const char *nick, const char *host, const char *target, char *args)
 983 {
 984         int ret;
 985         char *make[] = { "/usr/bin/make", "-j4", NULL };
 986         char *git_reset[] = { "/usr/bin/git", "reset", "--hard", "master", NULL };
 987         ret = pipe_command(b, target, nick, 0, 1, git_reset);
 988         if (ret) {
 989                 action(b, target, "could not rebuild");
 990                 return;
 991         }
 992         ret = pipe_command(b, target, nick, 0, 1, make);
 993         if (!ret)
 994                 kill(getpid(), SIGUSR1);
 995         else if (ret > 0)
 996                 action(b, target, "displays an ominous %i", ret);
 997 }
 998
 999 static void command_swear(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1000 {
1001         static const char *insults[] = {
1002                 "featherbrain",
1003                 "ponyfeathers",
1004                 "What in the hey?",
1005                 "What are you, a dictionary?",
1006                 "TAR-DY!",
1007                 "[BUY SOME APPLES]",
1008                 "{ Your lack of bloodlust on the battlefield is proof positive that you are a soulless automaton! }",
1009                 "Your royal snootiness"
1010         };
1011         privmsg(b, target, "%s: %s", args ? args : nick, insults[getrand() % elements(insults)]);
1012 }
1013
1014 static const char *perty(int64_t *t)
1015 {
1016         if (*t >= 14 * 24 * 3600) {
1017                 *t /= 7 * 24 * 3600;
1018                 return "weeks";
1019         } else if (*t >= 48 * 3600) {
1020                 *t /= 24 * 3600;
1021                 return "days";
1022         } else if (*t >= 7200) {
1023                 *t /= 3600;
1024                 return "hours";
1025         } else if (*t >= 120) {
1026                 *t /= 60;
1027                 return "minutes";
1028         }
1029         return *t == 1 ? "second" : "seconds";
1030 }
1031
1032 static void command_timeout(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1033 {
1034         struct command_hash *c;
1035         int64_t t = get_time(b, target);
1036         int64_t howlong;
1037         if (t < 0)
1038                 return;
1039         char *arg = token(&args, ' ');
1040         if (!arg || !args || !(howlong = atoi(args))) {
1041                 action(b, target, "pretends to time out");;
1042                 return;
1043         }
1044         c = &commands[strhash(arg) % elements(commands)];
1045         if (c->string && !strcasecmp(c->string, arg)) {
1046                 c->disabled_until = t + howlong;
1047                 const char *str = perty(&howlong);
1048                 action(b, target, "disables %s for %"PRIi64" %s", arg, howlong, str);
1049         } else
1050                 action(b, target, "clicks sadly at %s for not being able to find that command", nick);
1051 }
1052
1053 static void command_mfw(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1054 {
1055         char error[CURL_ERROR_SIZE], *new_url;
1056         CURL *h = curl_easy_init();
1057         struct curl_slist *headers = NULL;
1058         struct curl_download_context curl_ctx = {};
1059         headers = curl_slist_append(headers, "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0.1) Gecko/20100101 Firefox/9.0.1");
1060         headers = curl_slist_append(headers, "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
1061         headers = curl_slist_append(headers, "Accept-Language: en-us,en;q=0.7");
1062         headers = curl_slist_append(headers, "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7");
1063         headers = curl_slist_append(headers, "DNT: 1");
1064         headers = curl_slist_append(headers, "Connection: keep-alive");
1065         curl_easy_setopt(h, CURLOPT_HTTPHEADER, headers);
1066         curl_easy_setopt(h, CURLOPT_URL, "http://mylittlefacewhen.com/random/");
1067         curl_easy_setopt(h, CURLOPT_WRITEFUNCTION, write_data);
1068         curl_easy_setopt(h, CURLOPT_WRITEDATA, &curl_ctx);
1069         curl_easy_setopt(h, CURLOPT_ERRORBUFFER, error);
1070         curl_easy_setopt(h, CURLOPT_TIMEOUT, 8);
1071         curl_easy_setopt(h, CURLOPT_CONNECTTIMEOUT, 8);
1072         //curl_easy_setopt(h, CURLOPT_VERBOSE, 1);
1073         CURLcode ret = curl_easy_perform(h);
1074         if (ret == CURLE_OK && curl_easy_getinfo(h, CURLINFO_REDIRECT_URL, &new_url) == CURLE_OK)
1075                 privmsg(b, target, "%s: %s", nick, new_url);
1076         curl_slist_free_all(headers);
1077         curl_easy_cleanup(h);
1078         if (ret != CURLE_OK)
1079                 privmsg(b, target, "%s: You have no face", nick);
1080 }
1081
1082 static TDB_DATA get_mail_key(const char *nick)
1083 {
1084         TDB_DATA d;
1085         int i;
1086         d.dsize = strlen(nick)+1;
1087         d.dptr = malloc(d.dsize);
1088         for (i = 0; i < d.dsize - 1; ++i)
1089                 d.dptr[i] = tolower(nick[i]);
1090         d.dptr[i] = 0;
1091         return d;
1092 }
1093
1094 static void command_mail(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1095 {
1096         char *victim, *x = NULL;
1097         size_t len;
1098         int override = 0;
1099         int64_t last_seen = 0;
1100
1101         if (!mail_db || !seen_db)
1102                 return;
1103         TDB_DATA key, val;
1104         victim = token(&args, ' ');
1105         if (victim && !strcasecmp(victim, "-seen")) {
1106                 victim = token(&args, ' ');
1107                 override = 1;
1108         }
1109         if (!victim || !args || victim[0] == '#' || strchr(victim, '@') || strchr(victim, '.')) {
1110                 privmsg(b, target, "%s: Usage: !mail <nick> <message>", nick);
1111                 return;
1112         }
1113         if (!strcasecmp(victim, nick_self)) {
1114                 action(b, target, "whirrs and clicks excitedly at the mail she received from %s", nick);
1115                 return;
1116         }
1117         if (!strcasecmp(victim, nick)) {
1118                 action(b, target, "echos the words from %s back to them: %s", nick, args);
1119                 return;
1120         }
1121         int64_t now = get_time(b, target);
1122         if (now < 0)
1123                 return;
1124
1125         key = get_mail_key(victim);
1126         val = tdb_fetch(seen_db, key);
1127         if (val.dptr && (x = strchr(val.dptr, ','))) {
1128                 *(x++) = 0;
1129                 last_seen = atoll(val.dptr);
1130         }
1131         if (x && !admin(host) && (now - last_seen) < 300 && (!sstrncasecmp(x, "in ") || !sstrncasecmp(x, "joining "))) {
1132                 action(b, target, "would rather not store mail for someone active so recently");
1133                         goto out;
1134         } else if (last_seen && now - last_seen > 14 * 24 * 3600 && !override) {
1135                 int64_t delta = now - last_seen;
1136                 const char *str = perty(&delta);
1137                 privmsg(b, target, "%s: \"%s\" was last seen %"PRIi64" %s ago, use !mail -seen %s <message> to override this check.", nick, victim, delta, str, victim);
1138                 return;
1139         } else if (!x && !override) {
1140                 privmsg(b, target, "%s: I've never seen \"%s\", use !mail -seen %s <message> to override this check.", nick, victim, victim);
1141                 return;
1142         }
1143
1144         val = tdb_fetch(mail_db, key);
1145         if (!val.dptr)
1146                 val.dsize = 0;
1147         else {
1148                 unsigned char *cur;
1149                 int letters = 0;
1150                 for (cur = val.dptr; cur < val.dptr + val.dsize; cur += strlen(cur)+1)
1151                         letters++;
1152                 if (letters >= 4) {
1153                         action(b, target, "looks sadly at %s as she cannot hold any more mail to %s", nick, victim);
1154                         goto out;
1155                 }
1156         }
1157         len = snprintf(NULL, 0, "%"PRIi64 ",%s: %s", now, nick, args) + 1;
1158         val.dptr = realloc(val.dptr, val.dsize + len);
1159         snprintf(val.dptr + val.dsize, len, "%"PRIi64 ",%s: %s", now, nick, args);
1160         val.dsize += len;
1161         if (tdb_store(mail_db, key, val, 0) < 0)
1162                 privmsg(b, target, "%s: updating mail returns %s", nick, tdb_errorstr(mail_db));
1163         else
1164                 action(b, target, "whirrs and clicks at %s as she stores the mail for %s", nick, victim);
1165 out:
1166         free(val.dptr);
1167         free(key.dptr);
1168 }
1169
1170 static void single_message(struct bio *b, const char *target, char *cur, int64_t now)
1171 {
1172         char *endtime, *sep = strchr(cur, ':');
1173         int64_t delta = -1;
1174         if (sep && (endtime = strchr(cur, ',')) && endtime < sep) {
1175                 int64_t t = atoll(cur);
1176                 if (t > 0)
1177                         delta = now - t;
1178                 cur = endtime + 1;
1179         }
1180         if (delta >= 0) {
1181                 const char *str = perty(&delta);
1182                 privmsg(b, target, "%"PRIi64" %s ago from %s", delta, str, cur);
1183         } else
1184                 privmsg(b, target, "From %s", cur);
1185 }
1186
1187 static void command_deliver(struct bio *b, const char *nick, const char *target)
1188 {
1189         TDB_DATA key, val;
1190         unsigned char *cur;
1191         static unsigned mail_enter, mail_leave;
1192         if (mail_enter++ != mail_leave)
1193                 return;
1194
1195         if (!mail_db)
1196                 return;
1197         key = get_mail_key(nick);
1198         val = tdb_fetch(mail_db, key);
1199         if (!val.dptr)
1200                 goto end;
1201         int64_t now = get_time(b, NULL);
1202         if (strcasecmp(key.dptr, nick_self)) {
1203                 privmsg(b, target, "%s: You've got mail!", nick);
1204                 for (cur = val.dptr; cur < val.dptr + val.dsize; cur += strlen(cur)+1)
1205                         single_message(b, target, cur, now);
1206         }
1207         free(val.dptr);
1208         tdb_delete(mail_db, key);
1209 end:
1210         free(key.dptr);
1211         mail_leave++;
1212 }
1213
1214 static void update_seen(struct bio *b, char *doingwhat, const char *nick)
1215 {
1216         TDB_DATA key;
1217         key = get_mail_key(nick);
1218         TDB_DATA val = { .dptr = doingwhat, .dsize = strlen(doingwhat)+1 };
1219         if (seen_db)
1220                 tdb_store(seen_db, key, val, 0);
1221         free(key.dptr);
1222 }
1223
1224 static void command_seen(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1225 {
1226         char *arg = token(&args, ' '), *x;
1227         int64_t now = get_time(b, target);
1228         TDB_DATA key, val;
1229         if (now < 0)
1230                 return;
1231         if (!seen_db || !arg) {
1232                 privmsg(b, target, "%s: { Error... }", nick);
1233                 return;
1234         }
1235         if (!strcasecmp(arg, nick_self)) {
1236                 action(b, target, "whirrs and clicks at %s", nick);
1237                 return;
1238         }
1239         if (!strcasecmp(arg, nick)) {
1240                 action(b, target, "circles around %s dancing", nick);
1241                 return;
1242         }
1243         key = get_mail_key(arg);
1244         val = tdb_fetch(seen_db, key);
1245         if (val.dptr && (x = strchr(val.dptr, ','))) {
1246                 int64_t delta;
1247                 const char *str;
1248                 *(x++) = 0;
1249                 delta = now - atoll(val.dptr);
1250                 str = perty(&delta);
1251                 if (delta < 0)
1252                         privmsg(b, target, "%s was last seen in the future %s", arg, x);
1253                 else
1254                         privmsg(b, target, "%s was last seen %"PRIi64" %s ago %s", arg, delta, str, x);
1255         } else
1256                 action(b, target, "cannot find any evidence that %s exists", arg);
1257         free(val.dptr);
1258 }
1259
1260 static void command_mailbag(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1261 {
1262         char buffer[256];
1263         unsigned rem = sizeof(buffer)-1, first = 2;
1264         if (!mail_db)
1265                 return;
1266         buffer[rem] = 0;
1267
1268         for (TDB_DATA f = tdb_firstkey(mail_db); f.dptr;) {
1269                 if (f.dsize + 4 > rem) {
1270                         privmsg(b, target, "%s: Holding mail for: %s", nick, &buffer[rem]);
1271                         first = 2;
1272                         rem = sizeof(buffer)-1;
1273                         assert(f.dsize + 4 < rem);
1274                 }
1275                 if (f.dptr) {
1276                         if (first == 2) {
1277                                 first = 1;
1278                         } else if (first) {
1279                                 rem -= 5;
1280                                 memcpy(&buffer[rem], " and ", 5);
1281                                 first = 0;
1282                         } else {
1283                                 rem -= 2;
1284                                 memcpy(&buffer[rem], ", ", 2);
1285                         }
1286                         rem -= f.dsize - 1;
1287                         memcpy(&buffer[rem], f.dptr, f.dsize - 1);
1288                 }
1289                 TDB_DATA next = tdb_nextkey(mail_db, f);
1290                 free(f.dptr);
1291                 f = next;
1292         }
1293         if (first < 2)
1294                 privmsg(b, target, "%s: Holding mail for: %s", nick, &buffer[rem]);
1295 }
1296
1297 static void command_mailread(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1298 {
1299         TDB_DATA key, val;
1300         char *victim;
1301         if (!mail_db || !(victim = token(&args, ' ')))
1302                 return;
1303         key = get_mail_key(victim);
1304         val = tdb_fetch(mail_db, key);
1305         if (!val.dptr)
1306                 action(b, target, "ponyshrugs as no mail for %s was found", victim);
1307         else {
1308                 unsigned char *cur;
1309                 int64_t now = get_time(b, NULL);
1310                 action(b, target, "peeks through %s's mail", victim);
1311                 for (cur = val.dptr; cur < val.dptr + val.dsize; cur += strlen(cur)+1)
1312                         single_message(b, target, cur, now);
1313         }
1314         free(val.dptr);
1315         free(key.dptr);
1316 }
1317
1318 static void command_no_deliver(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1319 {
1320         TDB_DATA key, val;
1321         char *cur;
1322         if (!mail_db || !(cur = token(&args, ' ')))
1323                 return;
1324         key = get_mail_key(cur);
1325         val = tdb_fetch(mail_db, key);
1326         if (!val.dptr)
1327                 action(b, target, "ponyshrugs as no mail for %s was found", cur);
1328         else {
1329                 action(b, target, "deletes all evidence of %s's mail", cur);
1330                 tdb_delete(mail_db, key);
1331         }
1332         free(val.dptr);
1333         free(key.dptr);
1334 }
1335
1336 static void perform_roll(struct bio *b, const char *nick, const char *target, long sides, long dice, long bonus)
1337 {
1338         long rem = dice, total = bonus;
1339         while (rem--)
1340                 total += 1 + (getrand() % sides);
1341         if (bonus)
1342                 action(b, target, "rolls %li %li-sided %s for a total of %li (%+li)", dice, sides, dice == 1 ? "die" : "dice", total, bonus);
1343         else
1344                 action(b, target, "rolls %li %li-sided %s for a total of %li", dice, sides, dice == 1 ? "die" : "dice", total);
1345 }
1346
1347 static void command_roll(struct bio *b, const char *nick, const char *host, const char *target, char *args)
1348 {
1349         char *cur;
1350         long dice = 1, sides = 20;
1351         if ((cur = token(&args, ' '))) {
1352                 char *first = cur;
1353                 dice = strtol(first, &cur, 10);
1354                 if (first == cur)
1355                         dice = 1;
1356                 if (*cur && *cur != 'd' && *cur != 'D')
1357                         goto syntax;
1358
1359                 if (*cur) {
1360                         char *last = cur+1;
1361                         sides = strtol(last, &cur, 10);
1362                         if (last == cur)
1363                                 goto syntax;
1364                 }
1365         }
1366         if (dice <= 0 || dice > 10 || sides < 2 || sides > 20)
1367                 goto syntax;
1368         perform_roll(b, nick, target, sides, dice, 0);
1369         return;
1370
1371 syntax:
1372         action(b, target, "bleeps at %s in a confused manner", nick);
1373 }
1374
1375 static void add_g(struct bio *b, const char *target, int g)
1376 {
1377         int ret = 0;
1378         int64_t total_g = 0;
1379         TDB_DATA chan, res;
1380
1381         if (!chan_db || target[0] != '#')
1382                 return;
1383
1384         chan.dptr = (char*)target;
1385         chan.dsize = strlen(chan.dptr)+1;
1386         res = tdb_fetch(chan_db, chan);
1387         if (res.dptr && res.dsize >= 16) {
1388                 ((int64_t*)res.dptr)[1] += g;
1389                 if (res.dsize >= 24)
1390                         total_g = ((int64_t*)res.dptr)[2] += g;
1391                 ret = tdb_store(chan_db, chan, res, 0);
1392         }
1393         free(res.dptr);
1394         if (ret < 0)
1395                 fprintf(stderr, "updating database: %s", tdb_errorstr(feed_db));
1396         else if (g < total_g) {
1397                 int64_t last_g = total_g - g;
1398                 last_g -= last_g % 1000;
1399                 if (last_g + 1000 <= total_g)
1400                         privmsg(b, target, "g has been said %"PRIi64" times!", total_g);
1401         }
1402 }
1403
1404 static int parse_g(const char *cur, int *g)
1405 {
1406         int this_g = 0;
1407         for (const unsigned char *ptr = cur; *ptr; ptr++) {
1408                 if (*ptr >= 0x80)
1409                         return 0;
1410                 if (*ptr == 'g' || *ptr == 'G')
1411                         this_g++;
1412                 else if ((*ptr >= 'a' && *ptr <= 'z') || (*ptr >= 'A' && *ptr <= 'Z'))
1413                         return 0;
1414                 else if (*ptr != '1' && *ptr >= '0' && *ptr <= '9')
1415                         return 0;
1416         }
1417         *g += this_g;
1418         return this_g;
1419 }
1420
1421 static void channel_msg(struct bio *b, const char *nick, const char *host,
1422                         const char *chan, char *msg, int64_t t)
1423 {
1424         char *cur = NULL, *next;
1425         int is_action = 0;
1426         int g = 0;
1427
1428         int that = 0, what = 0, she = 0;
1429
1430         if (!msg || !strcmp(nick, "`Daring_Do`") ||
1431             !strcmp(nick, "derpy") || !strcmp(nick, "derpy2") || !strcmp(nick, "`Derpy`") ||
1432             !strcmp(nick, "`Luna`") || !strcmp(nick, "`Celestia`") || !sstrncmp(nick, "GitHub") ||
1433             !sstrncmp(nick, "CIA-") || !sstrncmp(nick, "Terminus") || !strcmp(nick, "r0m"))
1434                 return;
1435
1436         if (!sstrncasecmp(msg, "\001ACTION ")) {
1437                 msg += sizeof("\001ACTION ")-1;
1438                 is_action = 1;
1439                 asprintf(&cur, "%"PRIi64 ",in %s: * %s %s", t, chan, nick, msg);
1440         } else
1441                 asprintf(&cur, "%"PRIi64 ",in %s: <%s> %s", t, chan, nick, msg);
1442         if (t > 0)
1443                 update_seen(b, cur, nick);
1444         free(cur);
1445         (void)is_action;
1446
1447         next = msg;
1448         while ((cur = token(&next, ' '))) {
1449                 if (!strcasecmp(cur, ">mfw") || !strcasecmp(cur, "mfw")) {
1450                         if (!strcasecmp(chan, "#brony") || !ponify)
1451                                 continue;
1452                         if (t < 0 || t > commands[strhash("mfw") % elements(commands)].disabled_until)
1453                                 command_mfw(b, nick, host, chan, NULL);
1454                         return;
1455                 } else if (!sstrncasecmp(cur, "http://") || !sstrncasecmp(cur, "https://")) {
1456                         static char last_url[512];
1457                         char *part;
1458                         if (!strcmp(cur, last_url))
1459                                 return;
1460                         strncpy(last_url, cur, sizeof(last_url)-1);
1461
1462                         if (!sstrncmp(nick, "EqBot"))
1463                                 return;
1464
1465                         if (t >= 0 && t < commands[strhash("get") % elements(commands)].disabled_until)
1466                                 return;
1467
1468                         else if (strcasestr(cur, "youtube.com/user") && (part = strstr(cur, "#p/"))) {
1469                                 char *foo;
1470                                 part = strrchr(part, '/') + 1;
1471                                 asprintf(&foo, "http://youtube.com/watch?v=%s", part);
1472                                 if (foo)
1473                                         internal_link(b, nick, host, chan, foo, 0);
1474                                 free(foo);
1475                                 return;
1476                         } else if (strcasestr(cur, "twitter.com/") || strcasestr(cur, "mlfw.info") || strcasestr(cur, "mylittlefacewhen.com") || !strcasecmp(chan, "#geek"))
1477                                 return;
1478                         internal_link(b, nick, host, chan, cur, 0);
1479                         return;
1480                 }
1481                 else if (!sstrncasecmp(cur, "that") || !sstrncasecmp(cur, "dat"))
1482                         that = 1;
1483                 else if (that && (!sstrncasecmp(cur, "what") || !sstrncasecmp(cur, "wat")))
1484                         what = 1;
1485                 else if (what && !sstrncasecmp(cur, "she"))
1486                         she = 1;
1487                 else if (she && !sstrncasecmp(cur, "said")) {
1488                         if (t <= 0 || t >= commands[strhash("shesaid") % elements(commands)].disabled_until)
1489                                 privmsg(b, chan, "%s: \"%s\"", nick, women_quotes[getrand() % elements(women_quotes)]);
1490                         return;
1491                 } else if (parse_g(cur, &g))
1492                         continue;
1493         }
1494         if (g)
1495                 add_g(b, chan, g);
1496 }
1497
1498 static struct command_hash unhashed[] = {
1499         { "1", command_coinflip },
1500         { "fabric", command_fabric },
1501         { "get", command_get },
1502         { "hug", command_hug },
1503         { "hugs", command_hugs },
1504         { "admire", command_admire },
1505         { "snug", command_snuggle },
1506         { "snugs", command_snuggles },
1507         { "snuggle", command_snuggle },
1508         { "snuggles", command_snuggles },
1509         { "cuddle", command_cuddle },
1510         { "cuddles", command_cuddles },
1511         { "cookie", command_cookie },
1512         { "mfw", command_mfw },
1513         { "swear", command_swear },
1514         { "mail", command_mail },
1515         { "seen", command_seen },
1516         { "derpy", command_derpy },
1517         { "g", command_g },
1518         { "shesaid", command_shesaid },
1519         { "roll", command_roll },
1520
1521         { "rebuild", command_rebuild, 1 },
1522         { "abort", command_abort, 1 },
1523         { "crash", command_crash, 1 },
1524         { "inspect", command_inspect, 1 },
1525         { "timeout", command_timeout, 1 },
1526
1527         { "follow", command_follow },
1528         { "unfollow", command_unfollow },
1529         { "feeds", command_feeds },
1530
1531 // DEBUG
1532         { "feed_get", command_feed_get, 1 },
1533         { "feed_set", command_feed_set, 1 },
1534         { "feed_rem", command_feed_rem, 1 },
1535         { "feed_xxx", command_feed_xxx, 1 },
1536         { "feed_counter", command_feed_counter, 1 },
1537         { "seen_xxx", command_seen_xxx, 1 },
1538         { "mailbag", command_mailbag },
1539         { "mailread", command_mailread, 1 },
1540         { "\"deliver\"", command_no_deliver, 1 },
1541 };
1542
1543 static void init_hash(struct bio *b, const char *target)
1544 {
1545         int i;
1546         for (i = 0; i < elements(unhashed); ++i) {
1547                 unsigned h = strhash(unhashed[i].string) % elements(commands);
1548                 if (commands[h].string)
1549                         privmsg(b, target, "%s is a duplicate command with %s", commands[h].string, unhashed[i].string);
1550                 else
1551                         commands[h] = unhashed[i];
1552         }
1553 #ifdef local_commands
1554         for (i = 0; i < elements(local_commands); ++i) {
1555                 unsigned h = strhash(local_commands[i].string) % elements(commands);
1556                 if (commands[h].string)
1557                         privmsg(b, target, "%s is a duplicate command with %s", commands[h].string, local_commands[i].string);
1558                 else
1559                         commands[h] = local_commands[i];
1560         }
1561 #endif
1562 }
1563
1564 void init_hook(struct bio *b, const char *target, const char *nick, unsigned is_ponified)
1565 {
1566         char *cwd, *path = NULL;
1567         nick_self = nick;
1568         static const char *messages[] = {
1569                 "feels circuits being activated that weren't before",
1570                 "suddenly gets a better feel of her surroundings",
1571                 "looks the same, yet there's definitely something different",
1572                 "emits a beep as her lights begin to pulse slowly",
1573                 "whirrrs and bleeps like never before",
1574                 "bleeps a few times happily",
1575                 "excitedly peeks at her surroundings"
1576         };
1577         init_hash(b, target);
1578         ponify = is_ponified;
1579
1580         cwd = getcwd(NULL, 0);
1581         asprintf(&path, "%s/db/feed.tdb", cwd);
1582         feed_db = tdb_open(path, 0, 0, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
1583         free(path);
1584         if (!feed_db)
1585                 privmsg(b, target, "Opening feed db failed: %m");
1586
1587         asprintf(&path, "%s/db/chan.tdb", cwd);
1588         chan_db = tdb_open(path, 0, 0, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
1589         free(path);
1590         if (!chan_db)
1591                 privmsg(b, target, "Opening chan db failed: %m");
1592
1593         asprintf(&path, "%s/db/mail.tdb", cwd);
1594         mail_db = tdb_open(path, 0, 0, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
1595         free(path);
1596         if (!mail_db)
1597                 privmsg(b, target, "Opening mail db failed: %m");
1598
1599         asprintf(&path, "%s/db/seen.tdb", cwd);
1600         seen_db = tdb_open(path, 0, 0, O_RDWR|O_CREAT|O_CLOEXEC|O_NOCTTY, 0644);
1601         free(path);
1602         if (!seen_db)
1603                 privmsg(b, target, "Opening seen db failed: %m");
1604
1605         free(cwd);
1606         action(b, target, "%s", messages[getrand() % elements(messages)]);
1607 }
1608
1609 static void  __attribute__((destructor)) shutdown_hook(void)
1610 {
1611         if (seen_db)
1612                 tdb_close(seen_db);
1613         if (mail_db)
1614                 tdb_close(mail_db);
1615         if (feed_db)
1616                 tdb_close(feed_db);
1617         if (chan_db)
1618                 tdb_close(chan_db);
1619 }
1620
1621 static char *nom_special(char *line)
1622 {
1623         while (*line) {
1624                 if (*line == 0x03) {
1625                         line++;
1626                         if (*line >= '0' && *line <= '9')
1627                                 line++;
1628                         else continue;
1629                         if (*line >= '0' && *line <= '9')
1630                                 line++;
1631                         if (line[0] == ',' && line[1] >= '0' && line[1] <= '9')
1632                                 line += 2;
1633                         else continue;
1634                         if (*line >= '0' && *line <= '9')
1635                                 line++;
1636                 } else if (*line != 0x02 && /* BOLD */
1637                            *line != 0x1f && /* UNDERLINE */
1638                            *line != 0x16 && /* ITALIC */
1639                            *line != 0x06 && /* NFI, is this even used? */
1640                            *line != 0x07 && /* NFI, is this even used? */
1641                            *line != 0x0f) /* NORMAL */
1642                         return line;
1643                 else
1644                         line++;
1645         }
1646         return line;
1647 }
1648
1649 static char *cleanup_special(char *line)
1650 {
1651         char *cur, *start = nom_special(line);
1652         if (!*start)
1653                 return NULL;
1654         for (line = cur = start; *line; line = nom_special(line))
1655                 *(cur++) = *(line++);
1656
1657         for (cur--; cur >= start; --cur)
1658                 if (*cur != ' ' && *cur != '\001')
1659                         break;
1660
1661         if (cur < start)
1662                 return NULL;
1663         cur[1] = 0;
1664         return start;
1665 }
1666
1667 static void rss_check(struct bio *b, const char *channel, int64_t t)
1668 {
1669         static unsigned rss_enter, rss_leave;
1670         if (t >= 0 && rss_enter == rss_leave) {
1671                 rss_enter++;
1672                 channel_feed_check(b, channel, t);
1673                 rss_leave++;
1674         }
1675 }
1676
1677 static const char *privileged_command[] = {
1678         "{ Rarity, I love you so much! }",
1679         "{ Rarity, have I ever told you that I love you? }",
1680         "{ Yes, I love my sister, Rarity. }",
1681         "{ Raaaaaaaaaaaaaarity. }",
1682         "{ You do not fool me, Rari...bot! }"
1683 };
1684
1685 static int cmd_check(struct bio *b, struct command_hash *c, int is_admin, int64_t t, const char *prefix, const char *target)
1686 {
1687         if (c->left != c->enter)
1688                 privmsg(b, target, "Command %s is disabled because of a crash", c->string);
1689         else if (t > 0 && t < c->disabled_until && !is_admin) {
1690                 int64_t delta = c->disabled_until - t;
1691                 const char *str = perty(&delta);
1692                 b->writeline(b, "NOTICE %s :Command %s is on timeout for the next %"PRIi64 " %s", prefix, c->string, delta, str);
1693         } else if (c->admin && !is_admin)
1694                 privmsg(b, target, "%s: %s", prefix, privileged_command[getrand() % elements(privileged_command)]);
1695         else
1696                 return 1;
1697         return 0;
1698 }
1699
1700 void privmsg_hook(struct bio *b, const char *prefix, const char *ident, const char *host,
1701                   const char *const *args, unsigned nargs)
1702 {
1703         char *cmd_args, *cmd;
1704         const char *target = args[0][0] == '#' ? args[0] : prefix;
1705         unsigned chan, nick_len;
1706         struct command_hash *c;
1707         int64_t t = get_time(b, target);
1708         int is_admin = admin(host);
1709
1710         chan = args[0][0] == '#';
1711         if (chan) {
1712                 rss_check(b, args[0], t);
1713                 command_deliver(b, prefix, args[0]);
1714         }
1715         cmd_args = cleanup_special((char*)args[1]);
1716         if (!cmd_args)
1717                 return;
1718
1719         if (ident && (!strcasecmp(ident, "Revolver") || !strcasecmp(ident, "Rev")))
1720                 return;
1721
1722         if (chan && cmd_args[0] == '!') {
1723                 cmd_args++;
1724         } else if (chan && (nick_len = strlen(nick_self)) &&
1725                 !strncasecmp(cmd_args, nick_self, nick_len) &&
1726                 (cmd_args[nick_len] == ':' || cmd_args[nick_len] == ',') && cmd_args[nick_len+1] == ' ') {
1727                 cmd_args += nick_len + 2;
1728                 if (!cmd_args[0])
1729                         return;
1730                 chan = 2;
1731         } else if (chan) {
1732                 if (command_channel.enter == command_channel.left) {
1733                         command_channel.enter++;
1734                         snprintf(command_channel.failed_command,
1735                                  sizeof(command_channel) - offsetof(struct command_hash, failed_command) - 1,
1736                                  "%s:%s (%s@%s) \"#\" %s", target, prefix, ident, host, cmd_args);
1737                         channel_msg(b, prefix, host, args[0], cmd_args, t);
1738                         command_channel.left++;
1739                 }
1740                 return;
1741         }
1742         cmd = token(&cmd_args, ' ');
1743         if (!chan && cmd_args && cmd_args[0] == '#') {
1744                 if (!is_admin) {
1745                         privmsg(b, target, "%s: %s", prefix, privileged_command[getrand() % elements(privileged_command)]);
1746                         return;
1747                 }
1748                 target = token(&cmd_args, ' ');
1749         }
1750
1751         c = &commands[strhash(cmd) % elements(commands)];
1752         if (c->string && !strcasecmp(c->string, cmd)) {
1753                 if (cmd_check(b, c, is_admin, t, prefix, target)) {
1754                         c->enter++;
1755                         snprintf(c->failed_command, sizeof(*c) - offsetof(struct command_hash, failed_command) - 1,
1756                                  "%s:%s (%s@%s) \"%s\" %s", target, prefix, ident, host, cmd, cmd_args);
1757                         c->cmd(b, prefix, host, target, cmd_args);
1758                         c->left++;
1759                 }
1760                 return;
1761         } else if (cmd[0] == 'd' && cmd[1] >= '0' && cmd[1] <= '9') {
1762                 char *end;
1763                 long base;
1764                 base = strtol(cmd+1, &end, 10);
1765                 if (base > 1 && base <= 20 && !*end) {
1766                         long dice = 1, bonus = 0;
1767                         char *strdice;
1768                         c = &commands[strhash("roll") % elements(commands)];
1769                         if (!cmd_check(b, c, is_admin, t, prefix, target))
1770                                 return;
1771                         c->enter++;
1772                         snprintf(c->failed_command, sizeof(*c) - offsetof(struct command_hash, failed_command) - 1,
1773                                 "%s:%s (%s@%s) \"%s\" %s", target, prefix, ident, host, cmd, cmd_args);
1774
1775                         strdice = token(&cmd_args, ' ');
1776                         if (strdice) {
1777                                 dice = strtol(strdice, &end, 10);
1778                                 if (*end || !dice || dice > 10)
1779                                         goto syntax;
1780                                 strdice = token(&cmd_args, ' ');
1781                                 if (strdice) {
1782                                         bonus = strtol(strdice, &end, 10);
1783                                         if (*end || bonus > 1000 || bonus < -1000)
1784                                                 goto syntax;
1785                                 }
1786                         }
1787                         perform_roll(b, prefix, target, base, dice, bonus);
1788                         c->left++;
1789                         return;
1790
1791 syntax:
1792                         c->left++;
1793                         action(b, target, "bleeps at %s in a confused manner", prefix);
1794                         return;
1795                 }
1796         }
1797         if (chan == 2 && t > 0) {
1798                 static int64_t last_t;
1799                 if (t - last_t > 3)
1800                         privmsg(b, target, "%s: { I love you! }", prefix);
1801                 last_t = t;
1802         }
1803 }
1804
1805 void command_hook(struct bio *b, const char *prefix, const char *ident, const char *host,
1806                   const char *command, const char *const *args, unsigned nargs)
1807 {
1808         char *buf = NULL;
1809         int64_t t = -1;
1810         if (!strcasecmp(command, "NOTICE")) {
1811                 if (nargs < 2 || args[0][0] == '#')
1812                         return;
1813                 if (admin(host))
1814                         b->writeline(b, "%s", args[1]);
1815                 else
1816                         fprintf(stderr, "%s: %s\n", prefix, args[1]);
1817         } else if (!strcasecmp(command, "JOIN")) {
1818                 t = get_time(b, args[0]);
1819                 rss_check(b, args[0], t);
1820                 command_deliver(b, prefix, args[0]);
1821                 asprintf(&buf, "%"PRIi64",joining %s", t, args[0]);
1822         } else if (!strcasecmp(command, "PART")) {
1823                 t = get_time(b, args[0]);
1824                 rss_check(b, args[0], t);
1825                 asprintf(&buf, "%"PRIi64",leaving %s", t, args[0]);
1826         } else if (!strcasecmp(command, "QUIT")) {
1827                 t = get_time(b, NULL);
1828                 asprintf(&buf, "%"PRIi64",quitting with the message \"%s\"", t, args[0]);
1829         } else if (!strcasecmp(command, "NICK")) {
1830                 t = get_time(b, NULL);
1831                 if (t >= 0) {
1832                         asprintf(&buf, "%"PRIi64",changing nick from %s", t, prefix);
1833                         if (buf)
1834                                 update_seen(b, buf, args[0]);
1835                         free(buf);
1836                         buf = NULL;
1837                 }
1838                 asprintf(&buf, "%"PRIi64",changing nick to %s", t, args[0]);
1839         } else if (0) {
1840                 int i;
1841                 fprintf(stderr, ":%s!%s%s %s", prefix, ident, host, command);
1842                 for (i = 0; i < nargs; ++i)
1843                         fprintf(stderr, " %s", args[i]);
1844                 fprintf(stderr, "\n");
1845         }
1846         if (t >= 0 && buf)
1847                 update_seen(b, buf, prefix);
1848         free(buf);
1849         return;
1850 }
1851